The US has approved use of the world's first vaccine for honey bees.
It was engineered to prevent fatalities from American foulbrood disease, a bacterial condition known to weaken colonies by attacking bee larvae.
The US Department of Agriculture (USDA) approved a conditional license for the vaccine this week, according to the biotech firm behind its development.
As pollinators, bees play a critical role in many aspects of the ecosystem.
The vaccine could serve as a "breakthrough in protecting honey bees", Dalan Animal Health CEO Annette Kleiser said in a statement.